<div><br /></div> <div><br /></div>저는 MATLAB으로 이런 함수를 <div><br /></div> <div><span style="font-size: 9pt; font-family: Gulim; line-height: 21.600000381469727px">w=[0:0.001:1];</span></div> <div> <div style="font-family: Gulim; line-height: 21.600000381469727px"> <div>t=4425*sqrt(1./((1+w).^3*0.3+0.7));</div> <div>plot(w,t)</div></div> <div style="font-family: Gulim; line-height: 21.600000381469727px"><br /></div> <div style="font-family: Gulim; line-height: 21.600000381469727px"> <div><img class="tcx_image" src="http://thimg.todayhumor.co.kr/upfile/201403/1396095567FNunRXjLFsfqmtwuVS5KZMD1YQ8F9b.jpg" width="561" alt="what.jpg" style="max-width: 800px; height: auto" /></div><br /></div> <div style="font-family: Gulim; line-height: 21.600000381469727px"> <div><br /></div> <div>정적분했는데</div> <div><br /></div> <div> <div>w=sym('w','real');</div> <div>z=sym('z','real');</div> <div>f=4425*sqrt(1./((1+w).^3*0.3+0.7));</div> <div>int(f,w,0,0.4)</div> <div><br /></div> <div>왜 이런 값이 튀어나오는걸까요?</div> <div><br /></div> <div>- (2950*2^(1/2)*3^(1/2)*5^(1/2)*(((3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3 - 1)/((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3))^(1/2)*(1/((3^(2/3)*7^(1/3))/3 - (3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/3))^(1/2)*ellipticF(asin((((3^(2/3)*7^(1/3))/3 + 1)/((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3))^(1/2)), ((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3)/((3^(2/3)*7^(1/3))/3 - (3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/3))*((3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/3 + 1)^(1/2)*((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3)*(((3^(2/3)*7^(1/3))/3 + 1)/((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3))^(1/2)*i)/((3^(2/3)*7^(1/3))/3 - (7*(- 1/2 + (3^(1/2)*i)/2)*(1/2 + (3^(1/2)*i)/2))/3 + (3^(1/3)*7^(2/3)*(- 1/2 + (3^(1/2)*i)/2))/3 - (3^(1/3)*7^(2/3)*(1/2 + (3^(1/2)*i)/2))/3 + (3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/3 - (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3 - (3^(1/3)*7^(2/3)*(- 1/2 + (3^(1/2)*i)/2)*(1/2 + (3^(1/2)*i)/2))/3 + 1)^(1/2) + (2950*2^(1/2)*3^(1/2)*5^(1/2)*(((3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3 - 7/5)/((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3))^(1/2)*(1/((3^(2/3)*7^(1/3))/3 - (3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/3))^(1/2)*ellipticF(asin((((3^(2/3)*7^(1/3))/3 + 7/5)/((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3))^(1/2)), ((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3)/((3^(2/3)*7^(1/3))/3 - (3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/3))*((3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/3 + 7/5)^(1/2)*((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3)*(((3^(2/3)*7^(1/3))/3 + 7/5)/((3^(2/3)*7^(1/3))/3 + (3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/3))^(1/2)*i)/((49*3^(2/3)*7^(1/3))/75 - (7*(- 1/2 + (3^(1/2)*i)/2)*(1/2 + (3^(1/2)*i)/2))/3 + (7*3^(1/3)*7^(2/3)*(- 1/2 + (3^(1/2)*i)/2))/15 - (7*3^(1/3)*7^(2/3)*(1/2 + (3^(1/2)*i)/2))/15 + (49*3^(2/3)*7^(1/3)*(- 1/2 + (3^(1/2)*i)/2))/75 - (49*3^(2/3)*7^(1/3)*(1/2 + (3^(1/2)*i)/2))/75 - (7*3^(1/3)*7^(2/3)*(- 1/2 + (3^(1/2)*i)/2)*(1/2 + (3^(1/2)*i)/2))/15 + 343/125)^(1/2)</div> <div><br /></div> <div>울프람에 쳐봐도 똑같이 나오고... 미추어버리겠습니다.</div></div> <div><br /></div> <div><br /></div> <div><br /></div> <div>컴관련 내용이지만 수학적 문제라서 여기 올립니다.</div></div></div>
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